Just tried two Chrome extensions for summarising a Youtube video

Just tried a Chrome extension for summaring a Youtube video: 

YouTube Summary with ChatGPT

But it doesn't work, maybe because I'm not using Open AI's chatgpt. 

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Then I tried Elmo Chat, also a Chrome extension, which I originally installed

 for summarising a webpage, or a pdf document. Anyway I tried it with a Youtube video. 

It works!

It gives me: 

I. A summary. 

II. Opinions.

III. Timelined summaries

IV. a mindmap showing the content organisation of the video.